The teacher demanded that the exam _____ before eleven. 

A. must finish      B. would be finished   C. be finished     D. must be finished 

The suggestion has been made _____ the basketball game _____ put off.

A. for; to           B. that; be          C. which; should be  D. to; being

 “ _____ you play baseball?” “ No, I _______. “

A. Can; may           B. Can’t; can’t  C. May; can’t   D. can; can

 He _____ to the farm yesterday.  

A. need go 　　    B. needed go 　 　C. has to go 　　 D. had to go  

 —That must be a mistake.  

　 —No, it _____ a mistake.  

A. must not be 　B. needn’t be 　C. cannot be 　D. would not be  

—Use my umbrella to ______ yourself from the rain, will you?

   —That’s very kind of you.

prevent         B. keep      C. rescue     D. protect

Controlling water-pollution is necessary_____ it will be expensive.

A. so that        B. as if          C. even though     D. ever since

.Jack and I can go to the lecture ___

A. but neither can Mary   B. and do Mary can  C. but Mary can't   D. and Mary also can’t

_______China’s first manned space flight took place?

         A. When it was that   B. Was it when that   C. When was it that     D. Was it that when

Recently, tests have proved that Beethoven died from lead（鉛）poisoning. Bill Walsh directed the Beethoven Research Project. Mr Walsh and his team examined pieces of bone belonging to Beethoven. They found a large amount of lead in the bone pieces. They said the lead levels were equal to those found in pieces of his hair in earlier studies of other scientists.

Genetic tests proved the bone pieces and hair came from Beethoven. The researchers also examined bone fragments（碎片 from someone else who lived during the same period. Both were from the top of the skull. The fragments from Beethoven had more lead than those from the other person. Their study didn’t find measurable levels of cadmium (鎘) or mercury (汞), which scientists used to consider were the causes of his health problems.

  Beethoven was sick for much of his life. He experienced strong stomach pains, a sign of lead poisoning, and a change of personality when he was around 20. He also got angry easily, and suffered from depression and hearing loss. His health problems became worse as Beethoven grew older.

  Walsh said the lead levels found in Beethoven’s skull（顱骨） suggested the metal might have been present in his body for many years. He said although there had been recognized cases of deafness caused by lead poisoning, there was no strong evidence to suggest that lead poisoning was the cause of Beethoven’s deafness.

  Ludwig van Beethoven visited many doctors to find a cure for his health problems. In a letter he wrote to a friend, he asked researchers to examine his body after he died so that other people would not have to suffer as he did.

During the research, Walsh and his team didn’t ______.

A. examine the bone pieces of Beethoven

B. examine the bone pieces of another person

C. examine the lead levels of Beethoven’s hair

D. measure the cadmium or mercury in Beethoven’s bones

From the passage, we can learn that ___________.

A. this is the first research into the cause of Beethoven’s death

B. any amount of lead will do great harm to people’s health

C. more lead was found in Beethoven’s bones than in his hair

D. scientists used to think that Beethoven’s death was caused by other metals instead of lead

In which section（版）of the newspaper might you read this report?

A. Health.          B. Technology          C. Entertainment.           D. Culture.

What is the best title of the passage?

A. A surprising discovery about Beethoven.

B. Beethoven died from lead poisoning.

C. Lead — a killer metal for human beings.

D. New examination of Beethoven’s body.